Manufacture of a light-colored tar colloid having curative properties.



ISTVAN BUG'rARSZKY, 0F BUDAPEST, AUSTRIA-HUNGARY, ASSIGNOR OF ONE-THIRD TO LAJOS TOR-0K, or BUDAPEST, AUSTRIA-EU DB. WOLF as TSA vEGYnszErI GYAR, R.

PORA'IION OF HUNGARY.

NG-ARY, AND ONE-THIRD TO DR. KERESZTY,

'13., OF UJPES'E, AUSTRIA-HUNGARY, A COR- MANUFACTURE OF A LIGHT-COLORED TAR COLLOID HAVING CURATIVE PROPERTIES.

1 ,MMLQQZ.

No Drawing.

To all whom it may concern:

Be it known that I, Dr. Isrvin BUGAR- SZKY, a subject of the King of Hungary, re-

siding at Budapest, Austria-Hungary, have invented new and useful Improvements in the Manufacture of a Light-Colored Tar Colloid Having Curative Properties, of which the following is a specification.

The preparation oil of cade mentioned as being ofiicially approved in the mater-2c medz'ca books of Hungary and many other countries, could be more extensively used in dermal therapeutics than is at present the case if it did not contain certain constituents which impart to the preparation an irritating action on the skin and an unpleasant penetrating odor. Moreover the preparation has a dark brown color, which circumstance is objectionable when it is used as a cosmetic.

After long experiments I have succeeded in discovering a process, by means of which the undesirable constituents can be removed from the oil of cade without the constituents which have curative power thereby suffering any chemical change.

The process consists in that the oil of oade is subjected to fractional distillation in a vacuum at a pressure of or near to 20 mm. The first fraction begins to boil at about 50 C. \Vhen the boiling point 220 C. is reached, the distillation is interrupted, after which (likewise distillating in a vacuum) the second fraction boiling between 220 C. and 300 C. is taken; when the tem perature of 300 C. is reached, the distilla- Gopies of this patent may be obtained for five cents each, by addressing the Commissioner of iPatents,

Specification of Letters Patent.

tion is regarded as complete. -This fraction distllling in a vacuum between 220 C. and 300 G. contains the constituents having curative properties free from the unpleasant secondary constituents of the original substance. The product so obtained (i. e. the 'i product has a much higher density (1.053) than the fraction obtained from oil of cade between 150175 at a pressure of 3 mm.

(1.020). It is in a half liquid state, like honey, while the fraction obtained between F l50l75 at 3 mm. is an easily flowing liq-, uid like naphtha. The distillation under a Vacuum preferably takes place at a pressure I of 20 mm.

WVhat I claim is:

A process for the production of a light colored product having curative properties from oil of cade, consisting in that oil of" cade is subjected to fractional distillation in a vacuum at a pressure of or near to 20 mm. and the fraction taken between the tem-- peratures of 220 C. and 300 C.

DR. ISTVAN BUGARSZKY.

Witnesses:

CHAS. MESSINGER, EUGENE HARSANYI.

Washington, I). C.

Patented Nov. 16, 1915. Application filed December 17, 1912. Serial No. 737,216. 

